Improvement in building-blocks



'NITED STATES PATENT OFFICE.

BAYARD A. EEEEYMAN, 0E ST. LoUIS, MISSOURI, ASSIGNOE, BY MESNE ASSIGNMENTs'To HIMSELE, WILLIAM H. HEATH, AND WILLIAM H.

BARGLAY, OF SAME PLACE.

IMPROVEMENT IN BUILDING-BLOCKS.

Specification forming part of Letters Patent N o. 170,33 l, dated November 23, 1875; application filed p. July 24, 1815.

To all whom it may concern:

Be it known that I, BAYARD A. BERRYMAN, i

, In the drawings, Figure ll is a perspective view of my improved brick. Fig. 2 is a transverse section at brb, Fig. 3. Fig. 3 is a horizontal section at ce, Fig. 2.

The brick has an upper side, T, and lower side B, which constitute the broad sides of the brick. Its narrow sides are at S, and its ends at E. In the top T and bottom B are crucial-formed cavities or recesses. These reccsses 'are shown', in my preferred form, eX-

tending longitudinally at C, and transversely at G.

In laying up the bricks in a wall, the mortar, as it is spread on, fills the cavities C C of the course ot' bricks upon which it is spread, and as the bricks of the next course are set in the mortar, the latter enters the cavities in the under sides B of the bricks and makesa firm bond against horizontal movement in whatever position the bricks of the two courses may be placed relatively to each other.

It will be seen that the cavity at U will be in direct connection with the vertical stratum of mortar of the next course, both above and below, when the joint is broken, with the bricks of one course placed either in the same direction or at right angles with those of the course above and below.

It will also be seen thatthe form of the cavity C C is such that a bond is made by the mortar extending froml cavity to cavity, which prevents the slip of one brick upon another in any` direction.

These bricks may be used for all purposes to which ordinary bricks are applied, and even where laid side by side, as in pavements with looseV dry matter-such as sand and grayel-between, the said matter, by entering the BAYARD A. BERRYMAN.

Witn csses bAML. KNIGHT, ltoBT. BURNS. 

